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100,000 1 <br /> Total and Hexavalent Chromium 100,000 Iron and Manganese 1,000 Arsenic <br /> 10,000 t Iron <br /> —0—Total Chromium 10,000 Manganese - - WQO for Arsenic(10 Ng/L) <br /> Hexavalent Chromium - - <br /> WQO for Iron(300 Ng/L) <br /> J <br /> 1,000 — - - WQO for Chromium(50 Ng/L) - - WQO for Manganese(50 Ng/L) 100 <br /> c <br /> 1,000 <br /> 0 <br /> 100 - - - - - - - - - - - - - - - - - - - - - - - - <br /> - - - - - - - - - - - - - - - - - - - - - <br /> ■ = 100 2 <br /> v10 R - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ? 10 <br /> L = <br /> 10 c <br /> 1 o U <br /> U <br /> 0.1 1 1 <br /> Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 Jan.2008 Jan. 2009 Jan.2010 Jan.2011 Jan.2012 Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 <br /> 1,000 Sulfate 10,000 Total Organic Carbon 10,000 Total Dissolved Solids and Electrical Conductivity <br /> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1,000 <br /> 100 <br /> : E1,000 <br /> a� <br /> :T1 00 <br /> E as in <br /> E - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - <br /> c = <br /> O U <br /> ;a 10 w <br /> 10 am 100 <br /> C E <br /> U C = <br /> v 1 CO) <br /> 0 -411111--TDS <br /> - <br /> - <br /> WQO for Sulfate(250 mg/L) F_ EC <br /> - WQO for TDS(450 mg/L) <br /> 1 - 01p <br /> Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 Jan. 2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 <br /> 12 PH 600 Oxidation-Reduction Potential Notes <br /> 500 — The first sample point on the graphs represents baseline conditions before remedial <br /> 11 activities affected groundwater in the vicinity of the well <br /> 400 Non-detect values are plotted as half of the reporting limit <br /> 104 300 Metals samples were filtered before analysis; concentrations are on a dissolved basis <br /> r > Blue shading represents periods of treatment through vertical injection borings <br /> g = 200 Red shading represents periods of treatment through the horizontal wells <br /> A I E 100 11= micrograms per liter <br /> 8 0 0 pS/cm = microSiemens per centimeter <br /> mg/L= milligrams per liter <br /> a=i -100 WQO=water quality objective (not established if not shown on individual graphs) <br /> 6 -200 M W H <br /> 5 -300 FORMER MARLEY COOLING TOWER COMPANY <br /> -400 STOCKTON,CALIFORNIA <br /> 4 -500 CHEMICAL CONCENTRATIONS OVER TIME IN <br /> Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan. 2012 Jan.2008 Jan.2009 Jan.2010 Jan.2011 Jan.2012 SHALLOW WELL MW-201 <br /> GRAPH 13 <br />